| 摘要: | 
			 
		     | 对于C3中的超曲面上的任意(1,0)切向量场,证明了其上的交换子型和列维型是相等的.这在三维情形解决了D'Angelo提出的一个问题. | 
			
	         
				| 关键词:  有限型  拟凸超曲面  Bloom猜测  次椭圆估计 | 
			 
                | DOI: | 
            
                | 分类号:O174.56 | 
			 
             
                | 基金项目:The first author is partially supported by National Natural Science Foundation of China (11722110). | 
          |  | 
           
                | THE COMMUTATOR TYPE AND THE LEVI FORM TYPE IN C3 | 
           
			
                | YIN Wan-ke, YUAN Ping-san, CHEN Ying-xiang | 
           
		   
		   
                | School of Mathematics and Statistics, Wuhan University, Wuhan 430072, China | 
		   
             
                | Abstract: | 
			
                | For any fixed (1, 0) vector field of a pseudoconvex hypersurface in C3, we prove that its commutator type and Levi form type are equal to each other. This answers affirmatively a problem of D'Angelo in complex dimension three. | 
	       
                | Key words:  finite type  pseudoconvex hypersurface  Bloom conjecture  sub-elliptic estimates |